Mechanized Production + Ugin's Nexus + Teferi's Realm

Mechanized Production
Ugin's Nexus
Teferi's Realm

Requires
Mechanized Production must be on the battlefield. Ugin's Nexus must be on the battlefield. Teferi's Realm must be on the battlefield. Mechanized Production attached to Ugin's Nexus.
Steps
  1. At the beginning of your upkeep, Mechanized Production and Teferi's Realm trigger.
  2. Resolve the Mechanized Production trigger, creating a token copy of Ugin's Nexus.
  3. Put the token copy of Ugin's Nexus into exile due to the legend rule, causing you to take an extra turn after this one.
  4. Resolve the Teferi's Realm trigger, causing Ugin's Nexus and Mechanized Production to phase out.
  5. Move to your next turn.
  6. At the beginning of your untap step, Mechanized Production and Ugin's Nexus phase in.
  7. Repeat.
Results
Infinite turns.

Brudiclad, Telchor Engineer
0.02% of 5042 decks 1 decks
Taniwha
0.39% of 256 decks 1 decks
Morska, Undersea Sleuth
0.02% of 4505 decks 1 decks
Creatures
Plundering Barbarian
100% of 1 decks +99% synergy
Rionya, Fire Dancer
100% of 1 decks +99% synergy
Hellrider
100% of 1 decks +99% synergy
Bilbo, Retired Burglar
100% of 1 decks +99% synergy
Merchant of Truth
100% of 1 decks +99% synergy
Krenko, Mob Boss
100% of 1 decks +98% synergy
Humble Defector
100% of 1 decks +98% synergy
Jaxis, the Troublemaker
100% of 1 decks +98% synergy
Magda, Brazen Outlaw
100% of 1 decks +97% synergy
Combat Celebrant
100% of 1 decks +97% synergy
Urza, Prince of Kroog
100% of 1 decks +97% synergy
Feldon of the Third Path
100% of 1 decks +97% synergy
Old Gnawbone
100% of 1 decks +95% synergy
Tireless Tracker
100% of 1 decks +95% synergy
Adrix and Nev, Twincasters
100% of 1 decks +95% synergy
Jaheira, Friend of the Forest
100% of 1 decks +95% synergy
Peregrin Took
100% of 1 decks +95% synergy
Goldspan Dragon
100% of 1 decks +94% synergy
Mondrak, Glory Dominus
100% of 1 decks +91% synergy
Tireless Provisioner
100% of 1 decks +89% synergy
Schema Thief
50% of 2 decks +49% synergy
Canoptek Scarab Swarm
50% of 2 decks +49% synergy
Ethereal Investigator
50% of 2 decks +49% synergy
Chrome Host Seedshark
50% of 2 decks +48% synergy
Jin-Gitaxias, Progress Tyrant
50% of 2 decks +47% synergy
Thought Monitor
50% of 2 decks +47% synergy
Academy Manufactor
50% of 2 decks +46% synergy
Shimmering Efreet
33% of 3 decks +33% synergy
Faerie Artisans
33% of 3 decks +33% synergy
Timestream Navigator
33% of 3 decks +33% synergy
Corsair Captain
33% of 3 decks +33% synergy
Reef Worm
33% of 3 decks +32% synergy
Spawning Kraken
33% of 3 decks +32% synergy
Silent Arbiter
33% of 3 decks +32% synergy
Curiosity Crafter
33% of 3 decks +31% synergy
Trophy Mage
33% of 3 decks +31% synergy
Thassa, God of the Sea
33% of 3 decks +31% synergy
Shimmer Dragon
33% of 3 decks +31% synergy
Myr Battlesphere
33% of 3 decks +31% synergy
Tribute Mage
33% of 3 decks +31% synergy
Silver Myr
33% of 3 decks +30% synergy
Urza, Lord High Artificer
33% of 3 decks +30% synergy
Sakashima of a Thousand Faces
33% of 3 decks +30% synergy
Foundry Inspector
33% of 3 decks +29% synergy
Etherium Sculptor
33% of 3 decks +28% synergy
Solemn Simulacrum
33% of 3 decks +19% synergy
Instants
Officious Interrogation
100% of 1 decks +98% synergy
Desynchronization
100% of 1 decks +96% synergy
Dispatch
100% of 1 decks +95% synergy
Big Score
100% of 1 decks +91% synergy
Enlightened Tutor
100% of 1 decks +82% synergy
Cyclonic Rift
100% of 3 decks +72% synergy
Heroic Intervention
100% of 1 decks +70% synergy
Chaos Warp
100% of 1 decks +68% synergy
Beast Within
100% of 1 decks +61% synergy
Path to Exile
100% of 1 decks +55% synergy
Swords to Plowshares
100% of 1 decks +37% synergy
Counterspell
67% of 3 decks +24% synergy
See Double
50% of 2 decks +48% synergy
An Offer You Can't Refuse
50% of 2 decks +29% synergy
Time and Tide
33% of 3 decks +33% synergy
Reality Ripple
33% of 3 decks +33% synergy
Sunder
33% of 3 decks +33% synergy
Masterful Replication
33% of 3 decks +33% synergy
Gush
33% of 3 decks +33% synergy
Foil
33% of 3 decks +32% synergy
Engulf the Shore
33% of 3 decks +32% synergy
Capsize
33% of 3 decks +32% synergy
Perplexing Test
33% of 3 decks +32% synergy
High Tide
33% of 3 decks +30% synergy
Resculpt
33% of 3 decks +28% synergy
Fact or Fiction
33% of 3 decks +27% synergy
Mystical Tutor
33% of 3 decks +18% synergy
Arcane Denial
33% of 3 decks +14% synergy
Negate
33% of 3 decks +11% synergy
Sorceries
Organic Extinction
100% of 1 decks +97% synergy
Gamble
100% of 1 decks +90% synergy
Vandalblast
100% of 1 decks +84% synergy
Blasphemous Act
100% of 1 decks +66% synergy
Farseek
100% of 1 decks +66% synergy
Cultivate
100% of 1 decks +54% synergy
Fabricate
67% of 3 decks +61% synergy
Haunting Imitation
50% of 2 decks +50% synergy
Mirage Mockery
50% of 2 decks +49% synergy
Faerie Slumber Party
50% of 2 decks +49% synergy
Asinine Antics
50% of 2 decks +49% synergy
Whelming Wave
33% of 3 decks +31% synergy
Thoughtcast
33% of 3 decks +30% synergy
Windfall
33% of 3 decks +20% synergy
Utility Artifacts
Mirror Box
100% of 2 decks +99% synergy
Urabrask's Forge
100% of 1 decks +98% synergy
Worldwalker Helm
100% of 1 decks +98% synergy
Simulacrum Synthesizer
100% of 1 decks +98% synergy
Bootleggers' Stash
100% of 1 decks +98% synergy
Isochron Scepter
67% of 3 decks +64% synergy
Idol of Oblivion
67% of 3 decks +62% synergy
Swiftfoot Boots
67% of 3 decks +39% synergy
Ward of Bones
33% of 3 decks +33% synergy
Quicksilver Fountain
33% of 3 decks +33% synergy
Soul Foundry
33% of 3 decks +33% synergy
Mirror Gallery
33% of 3 decks +33% synergy
Worldslayer
33% of 3 decks +33% synergy
Mindslaver
33% of 3 decks +33% synergy
Krark-Clan Ironworks
33% of 3 decks +32% synergy
Trading Post
33% of 3 decks +32% synergy
Darksteel Forge
33% of 3 decks +32% synergy
Lithoform Engine
33% of 3 decks +32% synergy
Mirage Mirror
33% of 3 decks +32% synergy
Inspiring Statuary
33% of 3 decks +31% synergy
Sapphire Medallion
33% of 3 decks +31% synergy
Unwinding Clock
33% of 3 decks +31% synergy
Strionic Resonator
33% of 3 decks +30% synergy
Skullclamp
33% of 3 decks +21% synergy
Lightning Greaves
33% of 3 decks +8% synergy
Enchantments
Minimus Containment
100% of 1 decks +99% synergy
On the Trail
100% of 1 decks +98% synergy
Primal Vigor
100% of 1 decks +97% synergy
Curse of Opulence
100% of 1 decks +96% synergy
Parallel Lives
100% of 1 decks +93% synergy
Doubling Season
100% of 1 decks +91% synergy
Anointed Procession
100% of 1 decks +91% synergy
Tamiyo's Compleation
50% of 2 decks +50% synergy
Endless Evil
50% of 2 decks +49% synergy
Court of Vantress
50% of 2 decks +48% synergy
Shimmer
33% of 3 decks +33% synergy
Land Equilibrium
33% of 3 decks +33% synergy
Mana Vortex
33% of 3 decks +33% synergy
Dream Tides
33% of 3 decks +33% synergy
Infinite Reflection
33% of 3 decks +33% synergy
Overburden
33% of 3 decks +33% synergy
Mana Breach
33% of 3 decks +33% synergy
Stasis
33% of 3 decks +33% synergy
Back to Basics
33% of 3 decks +32% synergy
Thopter Spy Network
33% of 3 decks +30% synergy
Rhystic Study
33% of 3 decks +5% synergy
Planeswalkers
Chandra, Legacy of Fire
100% of 1 decks +99% synergy
Saheeli Rai
100% of 1 decks +99% synergy
Chandra, Hope's Beacon
100% of 1 decks +99% synergy
Saheeli, Sublime Artificer
100% of 1 decks +95% synergy
Karn, Scion of Urza
33% of 3 decks +33% synergy
Teferi, Master of Time
33% of 3 decks +31% synergy
Utility Lands
Hanweir Battlements
100% of 1 decks +99% synergy
Fomori Vault
100% of 1 decks +98% synergy
Tree of Tales
100% of 1 decks +98% synergy
Treasure Vault
100% of 2 decks +97% synergy
Kher Keep
100% of 1 decks +97% synergy
Fountainport
100% of 1 decks +96% synergy
Sokenzan, Crucible of Defiance
100% of 1 decks +95% synergy
Ancient Den
100% of 1 decks +95% synergy
Great Furnace
100% of 1 decks +94% synergy
Darksteel Citadel
67% of 3 decks +63% synergy
Buried Ruin
67% of 3 decks +61% synergy
Seat of the Synod
67% of 3 decks +60% synergy
Reliquary Tower
67% of 3 decks +37% synergy
Mirrorpool
33% of 3 decks +33% synergy
Inventors' Fair
33% of 3 decks +29% synergy
Academy Ruins
33% of 3 decks +28% synergy
War Room
33% of 3 decks +27% synergy
Rogue's Passage
33% of 3 decks +14% synergy
Mana Artifacts
Arcane Signet
100% of 3 decks +28% synergy
Sol Ring
100% of 3 decks +16% synergy
Liquimetal Torque
50% of 2 decks +46% synergy
Basalt Monolith
33% of 3 decks +31% synergy
Thran Dynamo
33% of 3 decks +28% synergy
Sky Diamond
33% of 3 decks +28% synergy
Midnight Clock
33% of 3 decks +28% synergy
Thought Vessel
33% of 3 decks +17% synergy
Lands
Tanglepool Bridge
100% of 1 decks +97% synergy
Razortide Bridge
100% of 1 decks +93% synergy
Temple of Plenty
100% of 1 decks +87% synergy
Temple of Enlightenment
100% of 1 decks +84% synergy
Temple of Mystery
100% of 1 decks +83% synergy
Seaside Citadel
100% of 1 decks +74% synergy
Yavimaya Coast
100% of 1 decks +74% synergy
Shivan Reef
100% of 1 decks +73% synergy
Training Center
100% of 1 decks +72% synergy
Steam Vents
100% of 1 decks +61% synergy
Hallowed Fountain
100% of 1 decks +59% synergy
Breeding Pool
100% of 1 decks +59% synergy
Exotic Orchard
67% of 3 decks +31% synergy
Command Tower
67% of 3 decks -7% synergy
Spire of Industry
33% of 3 decks +30% synergy
Fabled Passage
33% of 3 decks +24% synergy
Terramorphic Expanse
33% of 3 decks +18% synergy
Evolving Wilds
33% of 3 decks +12% synergy